This article explains the deadlift really nicely:
http://www.bodybuilding.com/fun/drobson101.htm
It not only works the lower body of your legs, and the workout also works most of your upper body as well. When I tried this workout at the gym yesterday, I could feel it in most body parts explained in that article. My legs still feel kind of weird walking around. My shoulders and traps feel a little bit of it too. I took a day off from doing back workouts today ’cause the deadlift works most of your back anyways. Yes, the deadlift pretty much works out your whole body in one set. I plan to do this exercise more often.
Kev
K'Brocking 
haha cool stuff, man.
Deads & squats’ll do ya every time!
Like all the good trainers say, though– form is more important than how much is on the bar. Especially with these! Be safe, use proper form, eat right and get frikkin’ huge.